Vehicle jack



April 2, 1935- w. H. COOK 1,996,612

VEHICLE JACK Filed Dec. 19, 1934 .ZZ msn/ra z M/ILLMM A! 600 3H dad Patented Apr. 2, 1935 UNITED STATES PATENT OFFICE VEHICLE JACK William H. Cook, Collier City, Fla.

Application December 19, 1934, Serial No. 758,194

2 Claims.

This invention relates to vehicle jacks and the main object is to provide a jack operated by the momentum or movement of the vehicle to raise any wheel of the same clear of the ground or road.

Another object-is to provide a device of this kind wherein novel and effective means is provided for preventing retrogressive or accidental lowering or falling back of the vehicle after it is once raised.

Another object is to provide a jack of this kind in simple, practical and convenient form including an arcuate shoe or rocker having arms supporting a saddle or seat for placing beneath the vehicle axle, the said seat being eccentric to the arc of the rocker so that as the vehicle moves forwardly the rocker will elevate the axle, a foot being slidably mounted through the trailing end of the rocker and having automatic means whereby said foot will maintain contact with the ground and will lock in this position to prevent retrogressive or rearward movement of the rocker and vehicle. To prevent lateral displacement or falling of the Jack provision is made to attach a strap which may encircle the adjacent wheel of the vehicle.

With these and other objects in view the invention resides in the novel construction and arrangement of parts as hereinafter fully set forth and claimed.

In the drawing:

Figure 1 'is a side view of the jack under a vehicle axle and wheel showing the position preliminary to elevating the wheel.

Figure 2 is a similar view showing the wheel raised.

Figure 3 is a rear end view of the jack alone.

Referring now with more particularity to the drawing the jack comprises an arcuate elongated shoe or rocker l serrated along its convex lower face 5 and provided near one end with an arm 6 extended from its concave inner face I and joined at some distance from the rocker by another and angularly disposed brace arm 8. At the end the arm 6 has an arcuate laterally widened saddle or seat 9. The rocker is seen in the drawing to be eccentric to the seat 9, that is, the frontal end In (as referring to the direction of movement in lifting as will be pointed out) of the rocker is a greater distance from the seat than the rear end II. The arrangement thus is such that by placing the jack under the vehicle the seat 8 may bear under the axle A thereof with the rear end ll contacting the ground B beneath,

while the frontend N of the rocker extends forwardly and upwardly (Figure 1). Then by moving the vehicle forwardly in the direction of this front rocker end It) the rocker will roll over the ground until it rests on the axle A and the attached wheel C will be elevated from the ground.

In order to prevent the vehicle from rolling backward and down off the jack a foot or foot bar 12 is provided and same is slidably mounted adjacent the inner end of a cleft l3 cut out in the rear end ll of the rocker 4 between the sides thereof, the said foot having a medial longitudinal slot l4 inwhich plays a pin l5 passed through the sides of the rocker. When the rear end of the rocker rests on the ground this foot l2 will, of course, be forced up in the cleft l3 to clear, but as the jack rocks forward to lift the vehicle the foot will fall of its own weight down through the cleft and its lower serrated end l6 will maintain contact with the ground as shown in Figure 2. The rear edge of the foot I2 is provided with ratchet teeth l1 and a dog I8 is fulcrumed at I! in the cleft I3 rearwardly of the foot with its pointed end or nose 20 engaging said teeth l1 and its rear handle end 2| protruding from the rocker. The weight of the handle 2| is such that it overbalances the dog and tends to move the nose end 20 up but the distance between the fulcrum l9 and the toothed edge of the foot holds this nose end pointed angularly downward and in engagement with the teeth l1. Thus as the foot 12 moves. downward the nose 20 plays over the teeth I! and by engagement therewith prevents the foot from again sliding upward. The foot then contacts the ground and prevents the jack from rolling back and allowing the vehicle to fall as will. be readily evident. To lower thehandle 21 may be raised to disengage the dog from the, foot l2 which then moves up and-allows the rocker l to roll back. To prevent the jack from falling or slipping sideways a strap 22 is passed through an eye 23 secured to the arm 6 and around the rim or tire D of the adjacent wheel 0 and buckled as at 2| thus holding the jack upright. Also this strap prevents the jack from simply sliding forward as the vehicle moves and if such should occur will start or pull on the jack as the wheel continues to turn.

While I have herein set forth a certain preferred embodiment of my invention, it is understood that I may vary from the same-in minor structural details, so as best to construct a prac-- tical device for the purpose intended, not departing from the spirit of the invention and within the scope of the appended claims.

I claim:

ica

a-fack, an arcuate rocker, an axle seat eccentr 11y disposed relative to the seat, the

eccentrically supported within the rocker, and end of the rocker nearest the seat having a cleft, idably mounted through the cleft and foot adapted for movement out through the cleft awa an adjustable foot slidably mounted at the end a foot sl of the rocker nearest the axle seat 5 having ratchet teeth the sai y and a gravity operated dog from the axle seat, ratchet teeth formed on the sably foot, and a gravity operated dog normally enon the rocker engaging the said teeth to relea lock the foot in a depressed posit gaging the said teeth to hold the foot in extended position.

ion.

2. In a jack, an axle seat, arms extended from the seat, an arcuate rocker supported by the arms WILLIAM H. COOK.

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